1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7c6bef10bd7d99ec5e92324dce2567260592ed306231719018193eef5505da. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f05ecf73-ce0d-4e18-ab8b-8e6217acf744.json and https://artists.proofprofile.net/proofs/artist/f05ecf73-ce0d-4e18-ab8b-8e6217acf744.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90210a5f17a0f3c67d6e749a4f61673a6f008c98fcd460d3b11060839288479e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAU2189452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72aec476b7f11e5666c4ba757be64cbd517ab309909ecaea12250caf317dd0a2. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAU2189466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88af69506b922b9c6cb4b5e7d78b3082c9c1d155ff7502e81c08af50a799353f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:39:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES62360002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544d80f18bfb30a5328d01a1c3666a790f5d223a3d8b81898c49d7c6f509fe38. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2346881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd271a00525cc6600fc5e3a511fed91ab70a7e2c0f132fbe5df0c790352788250. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFF2355023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb6564d600db7fac401983ac97615a129f78926243dcb86e5fd0fc63fbce38a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:33:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFF2355024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66fe60e5852453f4019b703dd7011be8399a1e9576a1acfeb54b206bd15794. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFF2355025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544d80f18bfb30a5328d01a1c3666a790f5d223a3d8b81898c49d7c6f509fe38. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2346881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa93205f1e07a9dd546589c6290df1a64fae259f5195a990b39089508d76ebf. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:53:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZQAY2471406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360d581c34f8a2e11cd9d103d1cae272005d479a79cbcc2196dca327a783d961. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZQAY2458611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83531f96c3a3227e0cfad07c2f036523bdbcb4d35a498232de31fa233856c778. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTLA2433288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dca349e70c0698bba4211ad75530975b5515d8f21c177ac7f27ecaf8884c8a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:25:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2420168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d06a086bb5b478b5952d313f356199c9c33e0a16069e45c733d7c7b07edbac6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:45:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2412586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa93205f1e07a9dd546589c6290df1a64fae259f5195a990b39089508d76ebf. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:45:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZQAY2471406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360d581c34f8a2e11cd9d103d1cae272005d479a79cbcc2196dca327a783d961. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:58:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZQAY2458611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedca9e681627ac829f1b20927298cd31c960d650109e122b757ca501c243a97c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2406214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf53b01b592adc5b5d0df4d6efeea9ed76fbfbbbff1c5e3107a438ab473cb50b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZQAY2443630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39782d732b97a2f141d2914299c9cdbe94f43b01a649f4b58e5f11cfd770371. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:32:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS7J2484612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25565f3acd94ec33d9f487607c026774c67ce9fc34df71f3138aa0b3aecc1313. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS7J2439445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3184202e07660707031fd8d3132b6c2e223d3594514b3d29e95720d0bbdbfe1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2493266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00c668dec051c0f85c0b03aa055ad1314c32946e7299eb76a955979f3cabd88. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTLA2516120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bf636d07dafcba4a98e2c9cf934b9afc8c689f96c2e62e889ba286b3415b10. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:02:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTLA2512391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ae767d977af4f715993b39e6b8f01128ef602d0b39ef28b70e669b82b1027d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2558808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487de1c1ac3f892a765b0e8ac1f21ef5f4fed94192f8e6a54a26edfae5644748. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTLA2567312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bc995ba12f489e79f29701ba575c387934612ae80c626891450a3fa5999888. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS7J2466115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3184202e07660707031fd8d3132b6c2e223d3594514b3d29e95720d0bbdbfe1. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2493266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec97380374c8f05c1e221c6a3e5f679fda058d3f59c8b483033ea7dfdba36722. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS7J2593479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d28f066b34e685adbf67ea8fbf8bdee7d436461e98e0558b39cd1392d20dc8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2597577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cca04e3932431d3d1dd8690813fe5222fa678a3eece4acbdfd6faf2233dc6f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2566379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c665410cd4a895a78a15078fb393fa051bf1de30fa7b548221f9702996ea5f6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:29:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTLA2529660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bab29641938477c7a8b153f89741b25f5f9455b11e144e13aded5b0488fdae1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZSYP2580504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf067403ad3c0d25f5b5e93125db6b5d359b70ed3b5b2c707fc1d2b24af672c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS7J2525632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd94f88e6fdee7a5a50aa6922fc7e1e53568fb44e9904b78f0c2f9701b3def4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P2421403.